At the reception line of a wedding, the bride, the groom, the best man, the maid of honor, the four ushers, and the four bridesmaids must line up to receive the guests.

(a) If these individuals can line up in any order, how many arrangements are possible?

(b) If the groom must be the last in line and the bride must be next to the groom, and the others can line up in any order, how many arrangements are possible? 

(c) If the groom is to be last in line, the bride next to the groom, and males and females are to alternate, how many arrangements are possible?